Nailing-machine for boots or shoes



(No Model.)

s. W. ROBINSON. NAILING MACHINE FOR BOOTS OR SHOES.

Patented Dec. 3, 1889.

IGM/M M ATTORNEY UN TED STATES PATENT OFFICE.

STILLMAN V. ROBINSON, OF COLUMBUS, OHIO, ASSIGNOR OF ONE-HALF TO THE \VIRE GRIP FASTENING COMPANY, OF BOSTON, MASSACHUSETTS.

NAlLlNG-MACHINE FOR BOOTS OR SHOES.

SPECIFICATION forming part of Letters Patent No. 416,272, dated December 3, 1889.

Application filed January 15, 1889. Serial No. 296,451. (No model.)

To aZZ whom it may concern: termination of the outer bent portion 1). Piv- Be it known that I, STILLMAN \V. ROBIN- otally connected with the crank-pin c of the SON, a citizen of the United States, residing crank c, "which extends beneath the bent porat Columbus, in the county of Franklin and tion I) of the standard, is the upper end of a 5 State of Ohio, have invented a ceitainnew pitman d, the pin 0 being of such length as and usefulImprovement in Nailing-Machines to project a short distance through said pitfor Boots or Shoes, of which the following man-head, as shown. is a specification. e represents a shaft pivoted horizontally in 00 My invention relates to nailing-machines, the outer end of the bent portion 1) of the IQ and particularly relates to machines for nailstandard and having mounted on its outer ing boots or shoes. end a belt-wheel f. Made to project from the The objects of my invention are to provide inner end of the shaft 6, at right angles therea machine of this class of such construction with, isa finger or arm g, preferably slightly as to cause the' driver to descend a definite curved, as shown, and of a length preferably 15 and uniform distance when striking the drivslightly greater than the main arm 0 of the ing-blows; to construct the same so that when crank. once properly adjusted it will remain perma- The lower or outer end of the pitman is nently in'adjustment to enable the driver to slotted or divided to receive the upper end of make quick and powerful blows in rapid suca vertical driving -rod h, which is pivot-ed 2o cession; to so construct the machine that the therein, and which, being approximately parexcess of force of a blow remaining when a allel with the standard a, bears loosely in nail is driven shall be quietly and harmlessly eyes formed in the outer ends of one or more spent; to insure the complete driving of the guide-arms a, projecting outwardly from the nail, and to accomplish the same in a simple, standard. Made to .cxtend from the stand- 25 noiseless, and effective manner. lhese obard at a point about opposite the lower end jects I accomplish in the manner illustrated of the pitman and in adirection at right anin the accompanying drawings, in which gles with the guide-arm a, and being then Figure 1 is a view in elevation of my mabent forwardly in the direction of said arms chine. Fig. 2 is a view at right angles with a to a point beyond the pitman-head, is a 0 that shown in Fig. 1, and Fig. is a view rod 1 Coiled about the rod i and having its taken on line as 00 of Fig. 1. outer end rigidly secured to the outer end of Similarletters referto similar parts throughsaid rod is a coiled spring 7c, the remaining out the several views. or inner end of which projects through the This invention consists, essentially, of a slot in the lower end of the pitman and rests 3 5 driver-rod pressed downward by spring-tenupon the head of the driving-rod, as shown. sion and raised by a pitman and crank so In the lower end of the driving-rod is'formed arranged that when the crank is turned past a socket, into which maybe inserted and held, 1 its upper dead-center it is released, and by by one or more set-screws or otherwise, a go tension of said spring is brought to its lower driving pin or head m. The work 01, into 0 dead-center or farther, thus forcing the driverwhich the nails are to be driven, may be suprod against a nail placed in such position as ported in such position that the hammer may to receive the blow. strike the nail bysupporting the same against a represents the standard or vertical frame a suitablyshaped nose 1), made to project of my machine, which may be of any desired from the standard a, to which it is secured,

5 form, but preferably has its upper portion 1) or it may be supported in any other desirable bent forward and thence downward a short way. The standard a may be provided withdistance, as shown. a suitable foot or base, which may rest upon 0 represents a crank having its shaft 0' pivthe floor, or may be formed, as shown, with otally supported in suitable bearings formed perforated projecting ears or lugs g, by means 50 in the body of the standard a at a point prefof which the standard may be secured to a erably slightly above and at one side of an wall or post at any desired height. imaginary horizontal line drawn through the The operation of my machine is as follows:

Motion having been communicated to the belt-wheel in the usual manner, it will. be seen that the revolution of its shaft will cause the revolution of the finger y, fixed thereon. 5 For illustration, I will suppose the crank-pin c to be at its lower deadcenter and the finger g approaching it. The finger being in motion, as above described, it will be seen that it will be brought into contact with the crankpin 0 and force the latter upward until past its upper dead center, at which point the tension of the spring 7.: will cause the crank-pin to leave the finger and force said crankpin, pitman, and driver quickly downward. I 5 his downward movement of said parts will cause the driver-head m to descend the exact distance fixed and determined by the length of the parts to drive home the mail 0', which is supported in proper position to receive the blow. If an excess of force is imparted by the spring, the crank will pass its lower deadcenter and raise the driver against the spring until the crank is arrested, when it will return toward the lower dead-center and oscillate in decreasing arcs until at rest. The continued steady motion of the shaft 6 will cause the finger q to seen again come into contact'with the crank'pin 0' when the latter will be again raised and another blow struck, as above described. 'lhe nails are thus driven in rapid succession, suitable mechanism being employed to feed the work alongand to support the nails in position to receive the blows. The work or shoe being nailed may be mounted 5 in the usual way on a jack, or it may be supported on a horn. In case a horn is used to support the work, which is stationary at a fixed height above the floor, it may be necessary, on account of the thickness of the work 40 to be nailed, to release the frame and fix it at a higher or lower point.

It is obvious that the herein-deseribed machine may be utilized not only for driving loose nails, but for driving ordinary shoe pegs or nails formed from continuous wire. It may be employed foran y other purpose where it is desired that quick decisive blows should be struck. It is also obvious that the finger 9 may be made shorter than shown,orof such. length that owing to its being held eccentiieally with relation to the crank c, as shown in Fig. 23 of the drawings, it will escape the crank-pin before the latter reaches its upper dead-center and allow the crank to drop back again from tension of the spring and thus produce the blow.

Other means than those herein employed may be used to impart motion to the crank to raise the latter from its lower dead-center for the purpose of prod ucing the blow.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is

11. In a nailing-maehine, the combination, with the frame a, its crank c, pitman (.l, pivoted to said crank, and spring-actuated driver 71, pivoted to said pitman and passing through guides at, of the driving-shaft c, pivoted, as described, in the frame, carrying on one end the finger g, substantially as and for the purpose specified.

2. In a nailing-machine, the combination, with a frame a, crank c, pitman (I, pivoted to said crank, driver 71, pivoted to said pitman, and an operating mechanism therefor, of a spring 7;, adapted to force said parts downward, substantially as and for the purpose specified.

In a nailing-machine, the combinatitm, with a frame a, crank e, pitnian (Z, pivoted to said crank, driver 71, pivoted to said pitman, the latter passing through guides a, and having a detachable head 11:, and operatingmeehanism therefor, of spring 71:, supported on arm 1., said spring having its loose end bearing in the lower end of the pitman (Z and upon the head of the driver h, substantially as and for the purpose specified.

4. In a nailing-machine, the combination, with the frame, of the crank c, pitman (l, pivoted to said crank, driver h, pivoted to said pitman and having detachable head on, and spring k, pressing upon said driver, with the driving-shaft e pivoted, as above described, in the frame, carrying on one end thereof the finger g, substantially as and for the purpose specified.

S'IIIILMAN \V. ROBINSON.

In presence of- U. C. SHEPHERD, BARTON GRIFFITH. 

